9907-252
9907-252
9907-252
9907-252
9907-252
9907-252
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9907-252

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Woodward 9907-252 is a 0.5–4.5 Vdc load-sharing module for generator real-power sensing and isochronous or droop control.
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Technical specifications for 9907-252

  • Manufacturer:
    Woodward
  • Part Number:
    9907-252
  • Product Family:
    Woodward Load Sharing Module / LSM
  • Product Type:
    Load Sharing Module
  • Stock:
    1
  • Woodward part number:
    9907-252
  • Module function:
    Generator load sharing
  • Output signal:
    0.5–4.5 Vdc
  • Supply:
    18–32 Vdc
  • Official manual:
    Woodward 02035 Rev E
  • Weight:
    1.397 kg
  • Estimated shipping dimensions:
    27.36x21.41x5.92cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Power Sensing Sharing Output Field Setup Product Applications

Features:

  • Load signal: provides the documented 0.5–4.5 Vdc output for a compatible speed-control input.
  • Operating modes: supports isochronous load sharing and droop applications.
  • Measured power: uses generator voltage and current inputs to represent real load.

The 9907-252 order code identifies the current low-voltage-signal Load Sharing Module variant.

PT and CT selection, phase order and output destination define whether the module can represent generator load correctly.

A staged test proves zero-load indication first and then confirms proportional sharing as generator load is raised.
Apter Power supports exact-model review and quotation for Woodward 9907-252 Load Sharing Module.
Woodward 9907-252 Load Sharing Module Manuals,Datasheets,Link

Important Notice: Use the complete 9907-252 product model in every document request.

  • Voltage inputs: PT connections establish the generator-voltage reference used by the module.
  • Current inputs: CT signals provide the load component needed for real-power calculation.
  • Phase relationship: correct phase pairing and polarity determine load direction and magnitude.
  • Measurement boundary: PT and CT ratios must agree with the installed generator record.
  • Signal range: 0.5–4.5 Vdc identifies the output interface of 9907-252.
  • Isochronous mode: compatible controls can share load while maintaining system frequency.
  • Droop mode: configured droop supports load division against a stiff bus or dissimilar controls.
  • Governor interface: the receiving speed-control input must accept the documented signal direction and range.
  • Safe isolation: PT and CT work follows the approved high-energy measurement-circuit procedure.
  • Polarity record: terminal and phase labels are captured before the old module is disconnected.
  • No-load check: initial output is verified before a generator is asked to assume significant load.
  • Load trial: proportional indication and stable sharing are confirmed during a controlled load increase.
  • Parallel generator sets: supplies a common load signal to compatible Woodward speed controls.
  • Isochronous sharing systems: supports coordinated real-power division among generating units.
  • Droop-controlled generators: provides the sensed-load input used for scheduled droop behavior.
  • Legacy load-sensing replacement: restores an exact 9907-252 position with recorded PT, CT and governor interfaces.
Description
9907-252 converts generator voltage and current information into a 0.5–4.5 Vdc load signal for a compatible electronic speed control. Its documented modes support isochronous load sharing or droop operation within the approved generator scheme.

Selection of 9907-252 depends on the surrounding measurement circuit: PT ratio, CT secondary, phase relationships and the receiving governor input all shape the operating result. The current 02035 manual also fixes the supply and installation limits for this exact variant.

During replacement, keep PT and CT circuits under the site safety procedure, reproduce terminal polarity and record droop/isochronous selections before energization. Commission the sensing path at no load first, then verify proportional load indication and stable sharing under a controlled load increase.
Alternative Names
9907252 9907 252 9907–252 99O7-252 9907-2S2 9907-25Z Woodward 9907-252 Load Sharing 9907-252 9907-252 0.5-4.5V P/N 9907-252
Technical notes
9907-252 is the 0.5–4.5 Vdc output variant. Preserve PT/CT ratios, CT polarity, grounding and the receiving governor input; a wiring or phase error can produce incorrect load direction even when the module powers normally.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
A replacement 9907-252 shows reverse load response. Should droop be adjusted?
No. Stop the load test and reconcile CT polarity and phase pairing first; tuning cannot correct a reversed measurement path.
Can a 4–20 mA load-sharing module be substituted for 9907-252?
Not without an engineered interface change, because 9907-252 is defined by its 0.5–4.5 Vdc output.
What evidence is needed before disconnecting the CT circuit?
Record phase, polarity, ratio and terminal mapping, then follow the site CT safety procedure before opening any secondary path.
The output is stable at no load but sharing is uneven under load. Where should diagnosis begin?
Compare PT/CT ratios, phase relationships and the receiving governor-input scaling before changing mode settings.
Can 9907-252 be mounted on an engine?
Follow Woodward’s installation boundary and avoid engine mounting; use an appropriate enclosure with the specified environmental protection.
What closes commissioning of 9907-252?
A correct no-load baseline, proportional load signal, stable sharing response and agreement with the generator metering record close the test.

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